Concrete-mixer.



A. G. OLSEN.

' CONCRETE MIXER.

APPLICATION FILED FEB. 6. 1915.

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A. G. OLSEN.

CONCRETE MIXER.

APPLICATION FILED FEB-6.1915.

LQM,86& Patented Apr. 3, 1917.

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, ALFRED G. OLSEN, or ELKI-IORN, wisconsm.

' CONCRETE-MIXER.

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Specification of Letters Patent.

Application filed February 6, 1915. Serial No. 6,583.

To all whom it may concern:

Be it known that I, ALFRED G. OLSEN, a citizen of the United States, residing at Elkhorn, in the county of Walworth and State of Wisconsin, have invented certain new and useful Improvements in Concrete- Mixers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in the double drum type of concrete mixers, and has for its primary object the simple and efficient control of concrete both in its retention in the respective drums and in its delivery from one to the other.

A further object is the effective control and cooperative delivery of Water to the moistening drum at the time of delivery of the drymixed concrete thereto.

With these and further objects in view, the invention comprises certain novel constructions, combinations and arrangements "of parts as will be hereinafter specifiedand claimed.

In the accompanying drawings,-

Figure 1 is a side elevation ,of a machine embodying the features of the present inventlon. r 1

Fig. 2 is a vertical section through-the drums, parts being seen in elevation.

Fig. 3. is a fragmentary, plan View.

Fig. 4 is a perspective view of the movable chute and connected partsdetached.

Referring to the drawings by numerals, 1 indicates a supporting frame-work on which is mounted the power plant 2 which may be an internal combustion engine or other motor as preferred. Journaled on rollers 3, '3, mounted in said frame-work,

; are the mixing drums 4 and 5. Drum 5 is provided with a peripheral sprocket 6 engaged and driven by a sprocket chain 7 which in turn is driven by gearing actuated from the power plant. The intake end of drum 4 is closed except for the axial intake opening 8,and into the opposite end of the drum-extends the larger end of drum 5. Drum'4 is preferably cylindricalwhile drum 5 isin the form of a truncated cone, tapering away from drum 4, and at the inner end of drum 5, that is the larger end, the drum is partially closed by a funnel-like flange 9 having the intake opening 10.

Patented Apr. 3,1916.

A socket 11 is fixed in frame 1 in an upright or verticalposition, and journaled in the socket is a shaft 12. The shaft 12 is bent or curved from the vertical toextend horizontally, and is also curved longitudinally from the beginning of its horizontal portion so as to have. its free end extending into the opening 8, the socket 11 being disposed at a point spaced in front of approximately the median line of drum 4, so that the free end of shaft 12 mav swing readily into and out of the drum. Shaft 12 carries a water supply tank 13, and the shaft is tubular at least for that portion of its length extending from the tank 13 to its free end ,so as to enable delivery of water vfrom the tank into the parts with which the free end of the shaft may be in communication. Preferably, the connection between tank 13 and shaft 12 is valved, as at 14, for controlling the delivery of water.

Fixed to the shaft 12 substantially at the free end thereof is a chute 15 consisting of a plate having laterally turned sides 15, 15",

and having its body set at an incline to the horizontal axis of that portion of shaft 12 on which the chute is mounted. The inclination of the chute is such and its vertical -outside of the chute 15, and has its inner end portion beveled to correspond with the inclination of the chute, so that the said sleeve affords a stiffening support for the chute, the sleeve being formed with an inner flange 16 riveted or otherwise fixed to the lower portion of the chute. The outer end portion of the sleeve 16 is flanged, as at 16, and mounted on the shaft 12 is a disk 17 engaging the outer end of and fixed to sleeve 16. The upper edge of disk 17 is bolted or otherwise fixed to the upper edge of chute 1.5 for aiding in supporting the same. The disk 17 is designed to act as a door, and is in the shape of a disk merely because the openings 8' and 10 are circular.

WVhen disk 17 is in position for closing the wet mixing drum, the chute 15 is wholly I within the said drum, whereby the chute is caused to assist as a deflector in mixing the material in this d-rum While the disk prevents entrance of additional material.

The drum 4 is provided with appropriate bafile plates 18 for lifting 11p contained con crete and tumbling it within the drum from an elevated point down across the drum. Drum 5 is also provided with plates, such as indicated at 19, for engaging concrete and directing the same along the drum toward the discharge end thereof.

A fixed chute is arranged just outside. of and-extends slightly into the intake or.

\ charging opening 8, the chute being susshaft or its connectionsand movingthe same upon the pivot of the shaft in its socket.

The door 17 is thus brought to a position closing opening 8, and the chute 15 is located across that portion of the drum 4. between the inner end of the contracted portion or funnel 9 and the opening 8 so as to receive the falling portions of concrete material as theyare discharged from the baffles 18 in the elevated position and are descending across the drum.' It will be particularly observedthat the incline of the funnel or contracted portion 9 is such that in extending across a portion of the inclosureof disposed at all times for directing concrete material falling thereon down into 'contact drum'4, the said funnel has its inclined wall with chute 15 Whenever the chute is in its outer position. By this means a chute 15 of minimum size may be employed, as it is not necessary for the chute to extend for the full width of drum 4, but only for that portion thereof between the inner end of the frustoconical or funnel-like portion 9 of drum 5 and'the opposite side of drum 4. The opera- ;tion of delivering the dry mix to chute 15 continues as long as any of the concrete material remains in drum 4, and all of the material is thus delivered through the opening 1O i'nto drum 5. 'At the time the chute 15 is f moved-to the concrete delivering position,

f pe p s pply of water to Qthe'tubular portion of shaft 12 so that as the concrete enters drum 5 the water enters with .it flowing inthe same direction of travel as the concrete so that the best possible opportunity is afforded for thoroughly and effectively moistening the concrete. The concrete is gradually fed by the blades 19 to the discharge end of drum 5 from which the concrete is delivered to any appropriate vehicle .for transportation to the point of use or for other disposal. The supplying of water may be accomplished either by having the tank 13 filledand opening valve 14 to the extent required for feedlng the water at the rate desired, or the valve can be left open and water supplied to tank 13 through a hose or otherwise at the rate desired.

The discharge end of drum 5 is normally closed by a funnel-shaped cap or cover 22 which snugly fits the open end of the drum, and which has its outer end tapered to an axial shaft journaled in a sleeve 23 and keyed thereto so as not to accidentally fall out of the sleeve. The sleeve 23 is carried by a pair of arms 24 which form a bail-like support and extend on opposite sides of the cap to points of pivotal supports 25, 25, at.

the upper ends of brackets 26, 26, which are fixed to and upstand from frame 1 on a lateral incline at opposite sides of drum 5. WVhen concrete is being delivered from drum 4 to drum 5, the cap 22 is positioned for closing the discharge end of drum 5, the cap remaining in its closed position by the force of gravity, as the pivot points 25 are above the cap when in its closed position, and the cap revolves freely with the drum so as not to offer frictional resistance. While the operator is removing one load of concrete, the concrete being fed along the drum 5 toward its discharge end will be forced over into the cap 22, and by the time the operator returns approximately a load of concrete will have collected at the discharge end of the drum so that all the operator needs to do is to grasp thesleeve 23 and lifting it upwardly swing the cap to its open position, so that the concrete will be discharged from the cap and from the open end of the drum.

' What I claim is:- v

1. 1n concrete mixing apparatus, the combination with a dry mixing drum and a wet mixing drum communicating therewith, of a chute for delivering material from the dry mixing drum to the wet mixing drum, the said chute being movable to and from a position effecting such delivery, the said'chute being of less dimension in the direction across the dry mixing drum than the width of said dry mixing drum, and the wet mixing drum being formed with means coiiperating with the chute for directing concrete material onto the chute when positioned with its uppermost portion adjacent that wall of the dry mixing drum remote from the wet mixing drum.

2. In concrete mixing apparatus, the combination with a dry mixing drum and a wet mixing drum communicating with and extending into the dry mixing drum, of a chute for delivering concrete material from the dry mixing drum to the wet-mixing drum, the chute being movably mounted and adapted to be moved to and from a position for effecting such delivery and being dimensio-ned to extend substantially from that wall of the dry mixingdrum remote from the wet mixing drum to the portion of the wet mixing drum extending into the dry mixing drum.

3. In concrete mixing apparatus, the combination with a dry mixing drum having an intake opening at one end, a wet mixing drum extending into the other end of the dry mixing drum and having an intake opening within the dry mixing drum, a feeding chute, and a movable support carrying the same and adapted to be moved for shifting the support through the intake opening of the wet mixing drum to and from a position across the dry mixing drum for delivering material from the dry mixing drum to the wet'mixing drum. t 4. In concrete mixing apparatus, tlie combination with a dry mixing drum, of, a wet mixing drum communicating with one end of the dry mixing drum, 'a chute movable through the end of the wet mixing drum from within the wet mixing drum to within the dry mixing drum for delivering material from the latter to the former, and a movable shaft sustaining the chute and having its chute engaging portion shiftable through the end of the wet mixing drum.

5. In concrete mixing apparatus, the combination with a dry mixing drum and a Wet mixing drum communicating with one end of the dry mixing drum, of a chute movable from within the wet mixing drum through the end thereof to within the dry mixing drum for delivering material therefrom to the wet mixing drum, and a door movable with the chute for closing the wet mixing drum when the chute is disposed therein.

6. In concrete mixing apparatus, the combination with a dry mixing drum and a wet mixing drummommunicating with'the dry mixing drum, of a shaft extending into the dry mixing drum and movable across the dry mixing drum to the wet mixing drum, and a chute carried by said shaft and movable therewith to and from a position fordischarging material from the wet mixing drum into the dry mixing drum.'

7 .In concrete mixing apparatus, the combination with a dry mixing drum and a wet mixing drum communicating with the dry mixing drum, of a pivotally mounted shaft having its free end extending into the wet mixing drum, and a chute carried b the free 7 I end portion of the shaft and mova 1e therewith to and from a position within the dry mixing drum for delivering material from the dry mixing drum into the wet mixing drum.

8. In concrete mixing apparatus, the combination with a dry mixing drum and a Wet -mixing drum communicating therewith, of a shaft movably extending into the wet mixing drum, a chute carried by the shaft within the wet mixing drum, and a door carried by the shaft in position for closing the com munication with the dry mixing drum, the shaft being movable for shifting the door for opening communication and for shifting the chute to position for directing material from the dry mixing drum to the wet mix- 9. In concrete mixing apparatus, the combination with a dry mixing drum and a wet mixing drum communicating. therewith, of a tubular shaft extending into said drum and movable relative thereto, a chute carried by said shaft and adapted to be moved therewith to and from a position for directing material from the dry mixing drum to the wet mixing drum, and means for delivering water through said shaft 10. In concrete mixing apparatus, the combination with a rotary dry mixing drum and a wet mixing drum carried thereby and communicating therewith, the wet mixing drum having an intake opening into the dry mixing drum and the dry mixing drum having an intake opening coaxial with the in-- cording to the relative position of the shaft.

11. In concrete mixing apparatus, the combination with a d mixing drum and a wet mixing drum havlng its intake end extending into the dry mixing drum and converging therein and forming an inwardly tapering frusto-conical portiom-of a chute movably mounted in the wet mixing drum and adapted to be moved into the dry mixing drum and dimensioned to extend from the inner. terminus of said frusto-conical portion to adjacent the remote wall of the dry. mixing drum for delivering material from the dry mixing drum to the wet mixing drum.

12. In concrete mixing apparatus, the combination with a dry mixing drum and a wet mixing drum communicating therewith, of a permanently inclined movably mounted chuteadaptedto move from within the dry mixing drum to within the wet mixing drum and from the wet mixing drum to Within the dry mixing drum for being adjusted to and In testimony whereof I aflix my signature from a position for effecting delivery from in presence of two Witnesses.

i the dry mixing drum to the Wet mixing drum, and a movable support for the chute ALFRED OLSEN adapted to be shifted for moving the chute Witnesses: to a position Wholly Within the Wet mixing JAY W. PAGE, drum.

JEANETTE WILSON. 

